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19691 Iwate (1999 RN214)
Classification: Main-belt Asteroid          SPK-ID: 2019691
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05939864617864443 1.2989e-08  
a 2.744227134255327 1.1438e-08 au
q 2.581223757673859 3.9352e-08 au
i 5.51884598999127 6.1452e-07 deg
node 162.5403439461386 1.0497e-05 deg
peri 246.647464183571 2.1058e-05 deg
M 250.372459435745 1.9923e-05 deg
tp 2459902.144954992897
(2022-Nov-18.64495499)
9.3029e-05 TDB
period 1660.46034473199
4.55
1.0381e-05
2.842e-08
d
yr
n .2168073457111718 1.3555e-09 deg/d
Q 2.907230510836794 1.2118e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2267  
   data-arc span      14487 days (39.66 yr)  
   first obs. used      1981-10-24  
   last obs. used      2021-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4839  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:51:36  

Additional Information
 Earth MOID = 1.59608 au 
 Jupiter MOID = 2.31244 au 
 T_jup = 3.339 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.39   n/a E2021B10  
diameter diameter 12.596 km 0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 37.637 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.041   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19691 Iwate           Discovered 1999 Sept. 5 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Iwate, the second largest prefecture in Japan, is located in north Honshu. Its coast was heavily damaged during the March 2011 tsunami. Iwate has one of the oldest astronomical institutions in Japan (Mizusawa Observatory), which was established for Earth rotation measurements.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

Alternate Designations
 1999 RN214 = 1981 UP17 = 1988 GC1 = 1990 TM 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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